Mold for head cores



June l0, 1930. w. D. MQQRE Er AL MOLD @5 HEAD coREs 2 Sheets-Sheet 1 Filed March 6, 1928,

- poised of oil and sand molded to 'shape,has at f Patented June A CORPORATION-or DELAWARE f Monnron HEAD 00ans l Application filed March 6,

- This inventionzis an improvementin molds Vfor head cores, andmore' particularly :in a mold for making head cores o the character shown, and described in application Serial. N0.2o,5,23s,f11ed July 12,1927.v i The'head core which the improved mold is designed to make has a design matrix so po,

ysitionedonthe corethat the design will be reproduced on the castingv atl the bell end,l that is, in a position where it'will loe prominently displayed, even when the pipe is piled.

A Pipes of the character in questionv are cast in rotary molds, withan independent', head core,`w hich is utilizedin the yformation kof the bell or socket'end. The core,.usually comone :end amarginal annular rib,- the` inner face of which provides Va convenient location or thematriX of the designl .1 TheY ribl facel is so placed' that during the casting of the .pipe by the centrifugalprocess, it :will receive the impact of the incoming molten metal while the mold'is tilted, and theimpact ofV the molten metal displaced longitudinally by centrifugal force during the rotation of the mold,fthus'to provide a vclean cut impression on the casting, W Diliculty has been experienced in obtaining a compact formation. ofthe sand in that part of the core forming the rib. The lrib is :formed in an annular Y'radialrecess between the-mold body andthe base, andthe space isnot positionedto receive direct compression stress from a1,head moving vinto the mold -through the opentop, Y Y

Ono of the primary objects of the presentl invention is tliefprovisionof mechanism( in connection witha mold Vof the class described, enabling the compacting of molding sand in a radialdirection'by a head rotating in the axisof the mold. l f c Another objectis the provision in such a lmechanism 'of normally ,operative means for maintaining the compressing mechanism in.

flanges frees. seria; ibjzwsamz.

WILLIAM D; ivrooRE,gosnrnfnonive, Annfwinnraivr; BovvERs-nrisrnmmsnnm, y

l ALABAMaAssrGNoRs Tofsann srnN rarnivcrsooaronnrronyor NEW yoiunlmy.,

operative position, released byafselected pres 1 sure of the compacted sand.`

l/Vith theser and otherobjects in view the invention consists in, theconstructi'on and novel combination of parts fully described hereinafter, illustrated in the accompanying` drawings, and pointed out'inthe claims .ap-

In the 'drawings forming a parthereofzf- `Figil is a side view of the with parts in section.

Fig; 2 Aisa plan view.Y

Fig. y3 is` an enlarged plan View of the l Fig. 4; is.A avertical section.

theoperating mechanism. The mold is sectional comprising similar sections 6,` .which are'hinged to Aoppositely disposed vvstandards standards, and at the tops ofgthesectionsgtlie hinged :connection 'including' pintle pins "10, which engage registering bearings, in the extenda abuttingfwhen the sectionsfare in closedV position,l and clamps 13 fwhich arepivf oted to the standards asindicated at 1 4. Each" vofthe clamps 13 is fork shaped as shown in Fig. 3, being adaptedtoengage lthe abutting 'flanges at Ythe adgacent'side ofthe ,mold be'- "t'veentle arms ci the fioriti, The burly ofthe Fig.l 5 is aV section in detail takemsubstantiallyontlie line 5-5 ofFig.`4

In the present embodiment of the invention Y a suitable frame is provided comprising anv uprght-l, a'lateral extending table Q-for sup'- portingfthe mold,`and ahead 3 for-supporting; jv

pended heretOQit'being understood that variyous changes injth'e form, proportion, size and, minor details of constructionwithin the scope l,of theclaims, maybe resorted to without de` parting from the spirit ofthe invention'- 'j improvedmoldV 7 and` `S'extending upwardly from a kbase plate 9, which seats upon the table 2. The "hinged connectionVv between' the sections'and the.,-standards' 7 and V8y is at lthe tops'of the .larly rabbetted as shownat Fig. 4 to'provide a central boss 18, which is designed to facilitate the centering of a core plate 19 on the swing plate. This core plate as shown has a central upwardly oifset portion "20 which seatsv over the boss, andfin additionhasan `upstanding annular rib or flangeA 21 near its yperipheral edge. When the mold parts are assembled, as clearly shown in Fig. 4, this rib itsi'in the lower ends of the sections 6.

Referring to Figs.` 3 and 4,' it will be seen that the mold parts areso shaped that when assembled'in moldingposition, they will provide for the forniationof a core `having' `a sub- `stantially cylindrical body indicated at 22, and a marginal ribA orlange 23 at one end, the fhinge being formed between the mold section 6 and the core plate'19. The top of the mold ispartially opento enable the format-ion of an axial scru pocket in `thecore. That is,`the mold construction enables theimolding of a core of the character shownanddescribed in i. Patent No. 1,613,899, granted on anuary 11,

- One or both'of the mold sections is provided on that part which directly faces the core plate 19 with a design 24a, in the form' of raised characters, which when the core is molded, form v'depressed characters in the core, this design ybeing in turn-'reproduced on the casting in raised characters. `Because of lthe location ofthe'design matrimfacing substantially parallel with the aiiisof the mold, Vand in theopposite .direction from the opening in the top, some difficulty is experienced in Vso packing the sand yin this Aspace asto produce a clear impression of the design on the rib or flange 23. i i

` A1n the prese'Nv lt construction mechanism is Aprovided for compressing the vsand inthis space, including a strikeheadg24 pinned or otherwise secured to a spindle 25, which is .journaledI in the head 3,'before mentioned,

andis designed to be rotated by means vofla crankshaft 26 journaled in the, head, and having a bevelgear connection 27 witha jack or coufntersh'afty 28, lwhich in turn is geared `to the spindle spurY gearing 29. ,The spindie is slidabiy` mounted in the b earingsBO vof the head, and a counterweighted lever 31 piv- `.oted tothe `upright 1 at 32`is also pivoted to the 'upper end of the spindle.

The counterweight 33 is normally designed to hold the spindle elevated, and a handled rod 34 is connected with the other end of the spindle to facilitate drawing the same downward when desired. .The spindle is section- A compressing finger 36 isvsuppo'rted the. 'strike head, the said Enger being connected with the lower end of a stem 37 which is mounted to rotate' in the strike head on an iead. rlhis springis arranged about areduced portion of the stem, 4being connected with the stem at one end, and with the strike head at the other, and the spring acts normally to hold the stem vin the position of Figs.

and 4, that is, in elevated position.

The upper end of the stem is yprovided with a hand piece'39, by means of which it may be moved loi'igitudinally, and Vrotated with Arespect 'to the strike head.. The stem Y is provided with a radial' lug or Y Vlock lpin 40 near its upper end, and the lug is adapted, when the stem is depressed, to register. with a plate spring 41 secured to the 'strike Ahead. yhis spi-ing is arranged to "bear against the outer 'end of the lug or strike pin 40 when the linger is in working position, and to normally hold the stem with the linger in such position. lt will be apparent that when there is'stress above ak selected pointV tending tol move the finger inward, the lug or lock pin will slip off the spring. The plate spring is, however, en-

gaged by a coil spring 42 arranged in a'lateral tubular extension 43 `from the strike liead. The spring encircles the reduced inner end1 of an adj usting screw 44 which has threaded engagement with the extension', and which .enables tension of the coil spring to'be varied. The spring 42, supplementstheaction of the spring 41,"and it is adj usted' to yield whenthe Y Y stress on the finger attains a selected degree. i Y Tlieoperation of the'device isas follows.

With the inold'p arts assembled, and the striking Ahead loweredinto the mold, the stem is pressed downwardly and turned to the right. n This 'operation moves the lockng'pin 40 into a pocket 45 in the strike head'in the inner end of the tubular extension 43, and into position of Fig. 5, with respect to the plate spring 41. A small quantity of sand is then placed in the mold or box, and the` spindle is rotated by f4.0 `and corel 1s then swung out of means of the crank shaft, The stri-ke head and fingery rotate, and the finger pressesltheffv sand closely intothe space between the facing. partsof'the core plateand mold body`sec-- tions. Vlhenthe pressure of thesandjis sufricient to overcome the holdingpower of the springs against the lock pin, the stem turns and :releases thepin 40, and the stem is moved upward by thespring 38. In order to enl sure that the element 36willbe in'position of. Fig. Sbwhen thefstrike headV is withdrawn from the mold, that is, after -the pin 40 is re- I Vwilly be-noted referring to Fig. Vl, that theshaped, while at thesame time the sand VisV v compressedinto vthe mold and surplus sand leased, a guide 46 is provided in connection with the strike head. This guide is'iniposi tion to be engaged by the'pin 40,-when the spring 38 moves t-he stem upward, and since the guide is inclined, the stem partially rotated to bring the finger 36intothel position of Figs. 3 and 4, that is, into a position'where it will clear the mold. f

The strike head is thenraised, and the box Yfilled with sand. Again t-he operator lowers the strike head androtates the spindle. It

under and outer edge Vof the strike head are 'shaped to form the scruff pocket in the core.

That is, they have a shape such thaty .when the strike head is rotated the scrulf pocket is is removed from the core pocket wall. lt will be notedthat when the head rotates, itv

`is with a neat running fit in the top of the mold. That head is then raised, the clamps loosened, and the moldopened. The sections,

' 6 swing about the pintles ,710, providing` for vertical movement of the sections Vwithdrespect'to the core plate andto the core, so

' that there is no marringof the design 'char- 'fica acters. The'swing plate with the core plate position above the base and the core removed. K

It will be apparent from the construction,

that the improved mechanismis adapted for displacing molding sand radially and compressing itin a radial direction, with'any construction of mold, and it is of especial advantage in displacing sand and compressing it into recesses in the mold wall. It willibe noted from inspection ofl Fig. 5, thatthe' iinger is curved, and that the. convex surfac thereof engages the sand.' What is claimed as new is 1. Mechanism to forma head core having in one end an axial scrufil receiving pocket, and at the other an external annular rib,

including a moldhaving an opening inits top of an area corresponding to that vof the cross section of the pocket, and a coaxial annular recess atthe oppositeend ,tofform al rib, means movable through the opening to shape the pocket and to displace molding sand radially and compress it in the recess when said means is rotated with respect `fto Vthe mold, said means including a strike head contoured to v*form `the l pocket, v i and a `com-v pressing. finger lnormally springpressed to inoperative l position,A and Vset 'p mechanism' Vfor .A holding the linger inoperative posit-ion Vand adapted to bey released' by the pressure ofthe lpoint ef. @meres sand when Vthe selected sionis attained.A

2.. Mechanism to-,forma headfcore having A.

injone end an axial scruff receiving pocket,

`and atthe other, an external annular rib, Vincluding a mold vhaving-,an opening 1n its top ofl an area'corresponding to thatlofgthe cross sectionof the vpocket, and a coaxial annular recess at the opposite endf'togform' thefrib, and"means movabler through the opening to .shapethefpocket and todisplace moldingsand radially andv compress itin the recess'when said vmeansis Yrotated withfre-v spect to the'mold,the `vmold being sectional andincludinga bottom, and a body, composed of similar sections hinged together. at the end remoteY from .the bottom'to swing outwardlyand upwardly away therefrom.

3. Al\[echanism vto forma head core having in one endaniaxialscruff receiving pocket, and at the other an external annular rib',

including a mold having'angopeningfin'its top of a area lcorresponding to that ofthe cross" section of the-pockengand .a coaxial annular recess atthe Vopposite' 'endto form Lthe rib, andv means movable through the opening toshape the pocket and to displace molding sand radially and compressitinthe recess when said means isl rotated with revspect to the mold,the moldjbeing sectional and including a bottom5-and a body composed ofl similar sections hingedtogether at the end remote from thebottomto swing outf wardlyy and upwardly'away therefrom,ithe

annular recessbeing formed betweenfthe botA tomand thebodysectionsg' .Y

in Tone end "an n axial scruff receiving pocket, and at theother an external annular rib, 1ncluding-a mold having an opening in its top of anarea correspondingto thatof lthe cross `section of the pocket, and a coaxial annular Vrecess at `the oppositeend to form the rib, and

means movable through theiopening to shape the pocket and to displace' molding sand radially and compress itlintherrecess wheny said .means is rotated withrespectto the `1vnold`the mold being sectional vran'drincluding a bottom, and albody composedfofsimilarsections hingedtogether at the endr remote from the bottom to Vswing outwardly andupwardlyrv away therefrom, -the annular .recess being formed between thebottom and the body sec? tions, the body'fsectionshaving an annular shoulder between therecess-andthe body pon tions thereof, saidshoulder facing the bottom andfhaving a' design matrix thereon. A 5. liechanisn'oto form ahead core lhaving in one end an axial scruff` receiving pocket, .and at the other an yexternal"annular rib,l ing cluding a mold havingan opening in its top of an area c'orrespondingto that of the cross. section `of thefpoclret, and a coaxial annular recess at the `opposite end to form the rib, means movable through the opening to shape thepo'cket and to displaceV molding sand radially and compress it in the Vrecess When said means is rotated VWith respect toV the mold, said' means including a compressing linger normally spring pressed to inopera-V tive 4kposition, and set mechanism for holding the finger in `operative position, and adapted to be released by excess of pressure on the linger above a selected point.

v6. Mechanism to form Va head core having anannular rib at one end and an axial'scrutl' receiving pocket at' the other, including a mold having an opening in its top of an area corresponding to'that of the cross section of the pocket, and a coaxial annular recess at thev opposite end Ato form the rib, a strike headv movable through the opening and conu toured to form the pocket when rotated, said strikehead having means to displace'mold- 25 lng sand radially and to compress it into the recess.` Y n Y 7. In a device of the class described, mech? anism to v displace molding sand radially and-'to compressthe sand against the Wall of al mold, including a rotatable member movable into the-mold and provided with a compressing finger normally resiliently held in inoperative position, and set mechanism for holding theAfinger inoperative position adapted to be released by a selected pressure onthelinger.

8. In a device 01"' the class described, mechanism todisplace molding sand radiallyand to compress the sand against the Wall of a mold, including a rotatable member movable Vinto the mold and provided with a lcompressing linger normally resiliently heldin inoperative position, and set mechanism for holding the finger in operative position adapted tobe released by a selected pressure on the nger, said linger having a convex surface for engaging the sand.

9. In a device of the class described, mechanism to displace molding sand radially and to compress the sand against the Wall of a mold, including a rotatable member movable into the mold and provided With a compressving linger normally resiliently held in inoperative position, and set mechanism for holding the linger in operative position adapted to be released by a selected pressure on the inger, means to-maintain the finger for rotating and llongitudinal movement in the access of themold, means to rotate the finger, and-means tomove the nger longitudinally. Y y

10. ln ay device fof the class described, mechanism to displace molding sand radially and to compress it against the Wall of the mold, including a rotatable 'member' linovable into the moldrv and provided With a'compre'ssing lli@ 

